JP2002317151A - Hard coat film for film base material and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hard coat film for a film base material which has sufficient adhesiveness to the base material and hardness, and is flexible. SOLUTION: The hard coat film for a film base material comprises a gel film obtained by hydrolyzing a mixture of an organic silicon compound and an aluminum compound to prepare a sol, which is applied on a transparent film base material followed by heating the formed film, wherein the organic silicon compound is represented by formula (1): Rm Si(OR')n (1) (wherein R is a hydrocarbon group having a group selected from a 1-10C alkyl group, vinyl group, (meth)acryloyl group, epoxy group, amide group, sulfonyl group, hydroxy group and carboxy group, R' is a 1-10C alkyl group, and m+n is an integer of 4); and the aluminum compound is represented by formula (2): Al(R1 )(R2 )(R3 ) (2) (wherein R1 , R2 , and R3 are the same as or different from each other, and each a group selected from a 1-10C alkyl group, alkoxy group, acyloxy group and hydroxy group, and all or any of them may be replaced with chelating ligands).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard coat film for a film substrate, which has both high strength and high flexibility and high transparency.

[0002]

2. Description of the Related Art Various hard coat films formed on a plastic film substrate have been proposed for the purpose of protecting the plastic film substrate. In particular, when the hardness of the surface of a coating film on a plastic film substrate is required, a coating film is formed using a coating liquid in which an inorganic filler is dispersed in a polymer binder.
On the other hand, a hard coat film is formed on an article for which surface protection is required using a coating liquid composed of water glass, or a coating liquid containing an organometallic compound represented by ethyl orthosilicate is applied to the surface of a substrate, and the coating liquid is applied. A hard coat film formed by forming a metal oxide film by a decomposition-condensation reaction has been proposed.

[0003]

A conventional hard coat film of a type obtained by using a coating liquid obtained by dispersing an inorganic filler in a polymer binder liquid is required to form an inorganic filler in order to obtain sufficient hardness. It needs to be included in large quantities. However, it is generally difficult to disperse the inorganic filler in the polymer binder liquid at a high concentration, and the liquid life is short because the inorganic filler is agglomerated even when the dispersion at a high concentration can be performed. There is a problem that the transparency of the film is lowered. Also,
A coating film formed by using a coating liquid in which such an inorganic filler is dispersed at a high concentration has improved surface hardness, but lacks flexibility of the coating film, and the coating film is damaged when the plastic film is bent. There is a problem of doing.

Further, when a hard coat film is formed on a plastic film substrate using a conventional coating solution composed of water glass, a baking process at a high temperature is required. It is impossible to do.

Further, a hard coat film formed using a sol obtained from a conventional hydrolysis-condensation reaction of an organometallic compound can be obtained by heating at a temperature at which a plastic film is not damaged. But,
It takes a long time to completely cure the coating film, resulting in poor productivity. In addition, the molecular weight is generally 10,000 or less, poor adhesion to the substrate, and at the same time hard and brittle even when formed into a coating film because of the unique properties of glass, can not follow the bending of the film, There is a problem that sufficient film strength cannot be obtained.

Accordingly, the present invention relates to a case where a hard functional component contained in a coating liquid for forming a hard coat film is stable in the liquid and the coating liquid is applied on a film substrate to form a coating film. It is another object of the present invention to provide a hard coat film for a film base material, which has a property that the coating film has sufficient adhesiveness to the substrate and the hardness of the coating film, and a property that the flexibility of the coating film is excellent.

[0007]

The above object is achieved by the present invention described below.

That is, the present invention provides a sol obtained by mixing and hydrolyzing an organosilicon compound represented by the following general formula (1) and an aluminum compound represented by the following general formula (2). This is a hard coat film for a film base, which is a sol film and mainly comprises a gel film obtained by gelling the sol film.

[0009]

Embedded image (R is a hydrocarbon group having 1 to 10 carbon atoms and having a group selected from an alkyl group, a vinyl group, a (meth) acryloyl group, an epoxy group, an amide group, a sulfonyl group, a hydroxyl group and a carboxyl group; Represents an alkyl group of Formulas 1 to 10, and m + n is an integer of 4.)

[0010]

Embedded image (R ₁ , R ₂ , and R ₃ may be the same or different and include halogen, an alkyl group, an alkoxy group having 1 to 10 carbon atoms,
It is a group selected from an acyloxy group and a hydroxy group, and these groups may be entirely or partially replaced by a chelating ligand. The method for producing a hard coat film for a film substrate of the present invention comprises:
After applying the sol obtained by mixing and hydrolyzing the organosilicon compound represented by the general formula (1) and the aluminum compound represented by the general formula (2) to a transparent film substrate, It is characterized in that the formed coating film is turned into a gel film by heating. Another method for producing a hard coat film for a film substrate according to the present invention is a method in which a gel film is formed by irradiating active energy rays instead of the method of forming a gel film by heating in the above-described method.

[0011]

Next, the present invention will be described in more detail with reference to preferred embodiments.

The organosilicon compound represented by the general formula (1) and used in the present invention is, specifically, tetramethoxysilane, tetraethoxysilane, tetra-iso-propoxysilane, tetra-n-propoxysilane, Tetra-n-butoxysilane, tetra-sec-butoxysilane, tetra-tert-butoxysilane, tetrapentaethoxysilane, tetrapenta-iso-propoxysilane, tetrapenta-n-propoxysilane, tetrapenta-n-butoxysilane, tetrapenta-sec -Butoxysilane, tetrapenta-tert-butoxysilane, methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxysilane, methyltributoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, dimethylethoxy Sisilane, dimethylmethoxysilane, dimethylpropoxysilane, dimethylbutoxysilane, methyldimethoxysilane, methyldiethoxysilane, hexyltrimethoxysilane, vinyltriethoxysilane, γ- (methacryloxypropyl) trimethoxysilane, γ-glycidoxy Propyltrimethoxysilane, 3-(-2-aminoethylaminopropyl) trimethoxysilane, vinyltrichlorosilane, vinyltris (β-methoxyethoxy) silane, vinyltrimethoxysilane, β- (3,4 epoxycyclohexyl) ethyltrimethoxysilane Γ-glycidoxypropylmethyldiethoxysilane, N-β- (aminoethyl) γ-aminopropylmethyldimethoxysilane, γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyl Pills trimethoxysilane, .gamma.-mercaptopropyltrimethoxysilane, although .gamma.-chloropropyl trimethoxy silane, and the like are not limited to these.

The aluminum compound used in the present invention represented by the general formula (2) may be an oligomer derived therefrom and / or a complex thereof.

In the hard coat film for a film substrate of the present invention, the proportion of the organosilicon compound represented by the above general formula (1) is preferably in the range of 90 to 70 mol%, more preferably 85 to 75 mol%. The range is desirable, and the ratio of the aluminum compound represented by the general formula (2) is preferably 10 to 30 mol%, more preferably 15 to 25 mol%.
Is desirable. When the amount of the organosilicon compound is less than 70 mol%, that is, the amount of the aluminum compound exceeds 30 mol%, the adhesion of the hard coat film to the film substrate is significantly reduced, and the flexibility of the cured film is lost. Absent. 90 organosilicon compounds
More than mol%, that is, 1
When the amount is less than 0 mol%, the hardening of the hard coat film is insufficient, and the strength of the coating film is remarkably reduced, which is not preferable.

The above-mentioned hydrolysis of the organosilicon compound and the aluminum compound is carried out directly on these mixtures or by dissolving them in a suitable solvent. As the solvent used, for example, methyl ethyl ketone, isopropyl alcohol, methanol, ethanol, methyl isobutyl ketone, ethyl acetate, alcohols such as ethyl acetate, ketones, esters, halogenated hydrocarbons, toluene, aromatic hydrocarbons such as xylene, Alternatively, a mixture thereof may be mentioned.

The sol produced by the above-mentioned hydrolysis can be adjusted to an appropriate solid content concentration, but preferably from 3% by weight to 7% by solid content from the viewpoint of coating suitability and liquid stability.
It is desirably 0% by weight, more preferably 20% to 60% by weight. If the concentration of the sol is less than 3% by weight, it is not suitable for coating, while if it exceeds 70% by weight, it becomes difficult to form a transparent homogeneous film. In the present invention, if the solid content of the sol is within the above range, it is also possible to add and use an organic or inorganic binder.

To this solution is added water in an amount not less than the amount required for hydrolysis, preferably at 15 to 90 ° C., more preferably at 22 to 90 ° C.
It is desirable to carry out stirring at a temperature of 80 ° C. for preferably 1 to 30 hours, more preferably 2 to 12 hours.

In the above-mentioned hydrolysis, it is preferable to use a catalyst as required for accelerating the reaction, and as such a catalyst, hydrochloric acid, nitric acid, sulfuric acid or acetic acid can be preferably used. These acids are added as an aqueous solution of about 0.001 to 5N, preferably about 0.005 to 2N, and the water in the aqueous solution can be used as the water for hydrolysis.

Since the sol thus obtained contains the above-mentioned aluminum compound, condensation between molecules proceeds and the sol itself becomes viscous as compared with the case where the organosilicon compound alone is hydrolyzed, and It shows good adhesion to the substrate.

The material used for the hard coat film for a film substrate according to the present invention may be formed by hard coating inorganic oxide fine particles having an average particle diameter of 10 to 300 nm when it is necessary to improve the strength of the coated film. The film may contain 3 to 80% by weight, preferably 20 to 60% by weight. The sol used in the present invention has good affinity for inorganic oxide fine particles, and can easily achieve uniform dispersion of the inorganic oxide fine particles in a solution or a coating film. When the amount of the inorganic oxide fine particles is less than 3% by weight, there is no effect in improving the hardness of the coating film, and when the amount is more than 80% by weight, the adhesion to the base material and the impact resistance decrease, which is preferable. Absent.

The particle diameter of the inorganic oxide fine particles which can be preferably used in the present invention is desirably in the range of 10 nm to 300 nm. This is a range in which an independent network of inorganic oxide fine particles can be easily formed, that is, at least a part of the inorganic oxide fine particles can be connected in a network. When an independent network of inorganic oxide fine particles is formed in the coating film, the transparency of the coating film is not impaired even when a large amount of inorganic oxide fine particles are present on the outermost surface of the coating film. The strength of the film can be increased. The average particle diameter of the inorganic oxide fine particles is 10 n
If it is less than m, dispersion is difficult. On the other hand, if it is more than 300 nm, light having a wavelength in the visible light range is scattered, and the transparency of the coating film is unfavorably deteriorated.

The inorganic oxide fine particles preferably usable in the present invention include titania, silica, zirconia, zinc oxide, alumina, tin oxide, indium-doped tin oxide (ITO), antimony-doped tin oxide (ATO), and aluminum-doped zinc oxide. At least one member selected from the group consisting of: Among these inorganic oxide fine particles, titania, zirconia, zinc oxide and the like can provide the hard coat film with reflectivity or antireflection property in order to improve the refractive index of the coating film. When aluminum-doped zinc oxide is used, the hard coat film can be provided with electrical performance such as antistatic.

Various additives can be added to the sol. The most important additives include curing agents that promote film formation, and examples of these curing agents include organic acid solutions of organic acid metal salts such as sodium acetate and lithium acetate, such as acetic acid and formic acid. The concentration of the organic acid solution is about 0.01 to 0.1% by weight, and the amount of the organic acid metal salt is about 0.1 to 1 part by weight based on 100 parts by weight of the sol particles. The range of the degree is preferable.

The film substrate used in the present invention includes:
For example, acetate butyrate cellulose film, polyether sulfone film, polyacrylic resin film, polyurethane resin film, polyester film, polycarbonate film, polysulfone film, polyether film, trimethylpentene film, polyetherketone film, (meta) A transparent plastic film substrate such as an acrylonitrile film can be used, but a uniaxially stretched polyester film is particularly preferably used because it has excellent transparency and does not have optical anisotropy. Usually, the thickness of about 8 μm to 1000 μm is suitably used.

In the present invention, the gel is formed by applying the sol to the surface of the film substrate and then heating or irradiating the coated material with active energy rays.

The sol is applied to a resin substrate by spin coating, dipping, spraying, roll coating, meniscus coating, flexographic printing, or the like.
Examples include a clean printing method and a bead coater method.

The curing by heating is preferably 150 ° C. or lower, more preferably 120 ° C. or lower when the film substrate is a plastic film in consideration of damage to the film substrate.

For curing by irradiation with active energy rays,
Irradiation with an electron beam or ultraviolet rays can be used, and an electron beam is particularly preferable. For example, in the case of electron beam curing, 50 to 1 emitted from various electron beam accelerators such as Cockloft-Walton type, Bande graph type, Resonant transformation type, Insulating core transformer type, Linear type, Dynamitron type, High frequency type, etc. 2,000 Ke
v, more preferably an electron beam having an energy of 80 to 300 Kev. In the case of ultraviolet curing, ultraviolet rays emitted from a light source such as an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a xenon arc, and a metal halide lamp. Used. When the active energy beam is an electron beam, the total irradiation amount of the active energy beam is 2 Mr.
ad or more, preferably in the range of 2 to 50 Mrad.

The electron beam irradiation, while replacing the air with oxygen, or it is preferably carried out with sufficient oxygen atmosphere, generation of SiO ₂ in the coating film by carrying out in an oxygen atmosphere,
The polymerization / condensation is promoted, and a more uniform and high quality gel layer is formed in a short time. In curing these coating films, the thickness of the gel film can be arbitrarily adjusted between 0.1 and 100 μm.

[0030]

EXAMPLES The hard coat film for a film substrate of the present invention will be described below with reference to examples.

Example 1 Preparation of Sol Solution 10.0 g (80 mol%) of 3-glycidoxypropyltremethoxysilane, 2.60 g (20 mol%) of aluminum sec-butoxide were placed in a flask and placed on ice. The mixture was stirred for 5 minutes while cooling. 2.85 g of distilled water was gradually added dropwise to the mixture, and the mixture was stirred for 60 minutes to obtain a transparent and uniform sol solution. This is called a sol solution.

Preparation of Dispersion Solution of Inorganic Oxide Fine Particles Rutile-type titanium oxide fine particles having a water-repellent surface (TTO51)
(C): 10.0 g of a trade name (manufactured by Ishihara Sangyo Co., Ltd.), dispersant (Dispervic 163: trade name, BYK Chemie
Japan Co., Ltd.) 4. O g to methyl isobutyl ketone 5
6.0 g was placed in a mayonnaise bottle, and the mixture was shaken for 10 hours with a paint shaker using about 4 times the amount of zirconia beads (φ0.3 mm) as a medium to obtain a primary average particle diameter of 3%.
A 0 nm titania fine particle dispersion was obtained.

Preparation of Inorganic Oxide Fine Particle-Dispersed Sol Solution -1 System Using Inorganic Oxide Fine Particles To 10.0 g of the above sol solution, 10.0 g of the above-prepared titania fine particle dispersion was added, and magnetized for 10 minutes The mixture was stirred with a tick stirrer to obtain a sol solution in which the inorganic oxide fine particles were dispersed. This is called sol solution-1.

2. System Using Inorganic Oxide Sol Sol-based 10.0 g of the above sol solution was charged with (MIBK-ST: trade name, colloidal silica having a solid content of 20% by weight) manufactured by Nissan Chemical Industries, Ltd. 0 g was added, and the mixture was stirred with a magnetic stirrer for 10 minutes to obtain a sol solution in which the title inorganic oxide sol was dispersed. This is called sol solution-2.

Formation of Hard Coat Layer A 100 μm-thick PET film (A-4350: trade name, manufactured by Toyobo Co., Ltd.)
The thickness of the sol solution obtained in -1, 2 after removal of the solvent is 1
Coating was performed so as to be 0 μm. The curing conditions used were the following two methods. That is, (1) a case where heat treatment is performed at 120 ° C. for 1 hour, and (2) a single irradiation dose of 20 Mrad at 180 kV and 20 mA using an electron beam irradiation apparatus.
The hard coat film is shown in both cases where irradiation was performed 20 times.

Evaluation of Characteristics of Hard Coat Film for Film Substrate Total light transmittance of film substrate formed with six types of hard coat films obtained by heating and electron beam irradiation (EB irradiation) through the above steps , JIS-K7361-1
Haze value based on JIS, pencil height of coating film based on JIS K5600-5-4, peeling test of base board using Cellotape (registered trademark), restoration test after scratching, The results of the bending test are shown in Table 1 below.

Restorability test The coating film on the film substrate was scratched with a 4H pencil at a load of 1 kg using a pencil height test method based on JIS K5600-5-4 and left for a predetermined time. The appearance of the flaw was observed with reflected light from an optical microscope. Table 1 below shows the resting time as a result of the restorability test in which the scratches given were no longer confirmed by an optical microscope. Was.

Folding test The coated film obtained in the above-mentioned process was 10 cm × 10
cm, and the center of the coated surface was mountain-folded to observe the state of the folded surface when completely folded. The results are shown in Table 1 below.

[Comparative Example 1] Only 10.0 g (80 mol%) of 3-glycidoxypropyltremethoxysilane was used without using an aluminum compound. 29 g was added and stirred for 60 minutes to obtain a coating liquid of Comparative Example 1.

Comparative Example 2 10.0 g (95 mol%) of 3-glycidoxypropyltremethoxysilane, 0.5 g
2 g (5 mol%) of aluminum sec-butoxide was stirred in a flask for 5 minutes while cooling with ice.

To this mixture was slowly added dropwise 2.39 g of distilled water, and the mixture was stirred for 60 minutes.
Was obtained.

Comparative Example 3 10.0 g (60 mol%) of 3-glycidoxypropyltremethoxysilane, 4.1
7 g (40 mol%) of aluminum sec-butoxide was stirred in a flask for 5 minutes while cooling with ice.

To this mixture, 3.19 g of distilled water was gradually added dropwise, and the mixture was stirred for 60 minutes.
Was obtained.

The three types of coating liquids obtained in Comparative Examples 1 to 3 were used as a transparent film substrate in the same manner as in Example 1 to form a PET film (A-435) having a thickness of 100 μm.
0: trade name, manufactured by Toyobo Co., Ltd.)
m, and heat-treated at 120 ° C. for 1 hour to obtain each coating film of Comparative Examples 1 to 3.

Table 1 below shows the results obtained by measuring the total light transmittance, the haze value, and the resilience, bending property, and adhesion of the coating film as optical characteristics of the film on which these coating films were formed.

[0046]

[Table 1]

According to Table 1, the hard coat film of Example 1 has both the property that the adhesion of the coating film to the substrate and the hardness of the coating film are sufficient, and the property that the flexibility of the coating film is excellent. You can see that. Compared to the coating film of Comparative Example 1 containing no aluminum compound, the hard coat film of Example 1 was the same as Comparative Example 1 except that it contained an aluminum compound. It can be seen that the properties are excellent. Further, the hard coat film of Comparative Example 2 having a component composition outside the range of the present invention containing 95 mol% of the organosilicon compound and 5 mol% of the aluminum compound has lower hardness than the hard coat film of Example 1, and It can be seen that the resilience is long. Further, the hard coat film having a component composition out of the range of the present invention containing 60% of the organosilicon compound and 40 mol% of the aluminum compound has lower hardness and less restoring property than the hard coat film of Example 1. It turns out that bending property is bad.

Example 2 Curing time test In Example 1, heating at 120 ° C. took one hour to completely cure the coating film of the sol solution of the present invention. It took one day and one day when the heating time was 80 ° C.

For comparison, it took two weeks at 60 ° C. and one week at 80 ° C. to completely cure the sol solution of Comparative Example 1. Therefore, the hard coat film for a film substrate of the present invention has an advantage that it can be applied to a film substrate that is easily damaged by heat, such as triacetyl cellulose, because the complete curing of the coating film is completed in a short time, so that the productivity is excellent. [Example 3] Curl generation test When the thickness of the coating film formed by using the sol solution of the present invention in Example 1 was up to 10 µm, no curl of the film substrate was observed. The thickness of the coating film formed using the sol solutions -1 and -2 of the present invention is 25 μm.
When it was up to, no curling was observed.
On the other hand, in the sol solution of Comparative Example 1 to which no aluminum compound was added, curling was observed when the film thickness exceeded 5 μm. For the sol solution containing 95% of the organosilicon compound of Comparative Example 2, curling occurred when the film thickness exceeded 8 μm. In Comparative Example 3, it was almost the same as the sol solution of Example 1.

[0050]

According to the hard coat film for a film substrate of the present invention, the hard functional component contained in the coating solution for forming the hard coat film is stable in the solution, and the coating solution is applied onto the film substrate. When the film is formed by coating, the film has both a property that the substrate adhesion and hardness of the film are sufficient and a property that the flexibility of the film is excellent.

The hard coat film for a film substrate of the present invention is prepared by mixing the organosilicon compound and the aluminum compound and hydrolyzing the sol to prepare a sol, and the sol film is gelled. Therefore, the aluminum compound contained in the sol functions as a catalyst for polycondensation of silica. Therefore, curing can be performed at a lower temperature and in a shorter time than when no aluminum compound is contained.

The hard coat film for a film substrate of the present invention is excellent in productivity because the coating film can be completely cured in a short time. In the hard coat film for a film substrate of the present invention, curling of the coating film after heat curing is small.

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 4F006 AA35 AB39 BA02 CA05 EA03 4F100 AA21B AH06B AH08B AK42A AT00A BA02 BA07 GB07 GB15 GB31 GB90 JB12 JK04 JK06 JK08 JL00 JM01B JM10B JN01 4J038 DL021 HA03

Claims (7)

[Claims] A sol film obtained by mixing and hydrolyzing an organosilicon compound represented by the following general formula (1) and an aluminum compound represented by the following general formula (2) to form a sol film, A hard coat film for a film base, comprising a gel film obtained by gelling the sol film as a main component. Embedded image (R is a hydrocarbon group having 1 to 10 carbon atoms and having a group selected from an alkyl group, a vinyl group, a (meth) acryloyl group, an epoxy group, an amide group, a sulfonyl group, a hydroxyl group and a carboxyl group; Represents an alkyl group of Formulas 1 to 10, and m + n is an integer of 4.) (R ₁ , R ₂ , and R ₃ may be the same or different and include halogen, an alkyl group, an alkoxy group having 1 to 10 carbon atoms,
It is a group selected from an acyloxy group and a hydroxy group, and these groups may be entirely or partially replaced by a chelating ligand. ) 2. The proportion of the organosilicon compound represented by the general formula (1) is in the range of 90 to 70 mol%, and the proportion of the aluminum compound represented by the general formula (2) is 10%.
The hard coat film for a film substrate according to claim 1, wherein the content is in a range of from 30 mol% to 30 mol%. 3. The hard coat film having an average particle size of 1
3. The hard coat film for a film substrate according to claim 1, comprising 3 to 80% by weight of inorganic oxide fine particles of 0 to 300 nm. 4. The hard coat film for a film substrate according to claim 3, wherein at least a part of the inorganic oxide fine particles are connected in a network in the hard coat film. 5. The inorganic oxide fine particles are one selected from titania, silica, zirconia, zinc oxide, alumina, tin oxide, indium-doped tin oxide (ITO), antimony-doped tin oxide (ATO), and aluminum-doped zinc oxide. The hard coat film for a film substrate according to claim 3 or 4, wherein the hard coat film is a fine particle. 6. A sol obtained by mixing and hydrolyzing an organosilicon compound represented by the following general formula (1) and an aluminum compound represented by the following general formula (2) to obtain a transparent film substrate A method for producing a hard coat film for a film substrate, comprising applying the formed coating film to a gel film by heating after coating the film. Embedded image (R is a hydrocarbon group having 1 to 10 carbon atoms and having a group selected from an alkyl group, a vinyl group, a (meth) acryloyl group, an epoxy group, an amide group, a sulfonyl group, a hydroxyl group and a carboxyl group; Represents an alkyl group of Formulas 1 to 10, and m + n is an integer of 4.) (R ₁ , R ₂ , and R ₃ may be the same or different and include halogen, an alkyl group, an alkoxy group having 1 to 10 carbon atoms,
It is a group selected from an acyloxy group and a hydroxy group, and these groups may be entirely or partially replaced by a chelating ligand. ) 7. A sol obtained by mixing and hydrolyzing an organosilicon compound represented by the following general formula (1) and an aluminum compound represented by the following general formula (2) to obtain a transparent film substrate A method for producing a hard coat film for a film substrate, comprising applying the formed coating film to a gel film by irradiating the film with an active energy ray after applying the film to the substrate. Embedded image (R is a hydrocarbon group having 1 to 10 carbon atoms and having a group selected from an alkyl group, a vinyl group, a (meth) acryloyl group, an epoxy group, an amide group, a sulfonyl group, a hydroxyl group and a carboxyl group; Represents an alkyl group of Formulas 1 to 10, and m + n is an integer of 4.) (R ₁ , R ₂ , and R ₃ may be the same or different and include halogen, an alkyl group, an alkoxy group having 1 to 10 carbon atoms,
It is a group selected from an acyloxy group and a hydroxy group, and these groups may be entirely or partially replaced by a chelating ligand. )